Around the UK, a hidden crisis has been growing over the past eight years.

Since the Grenfell Tower fire in 2017, something extraordinary has become clear about many of Britain's high-rise residential buildings. They are nothing like as safe as we had imagined.

In fact, the latest statistics show that more than 5,000 high-rise buildings have faults so serious they pose a risk to life. Clearing this up has quietly become one of the biggest infrastructure challenges of our generation, with a bill totalling £16.6 billion and rising, and a project which could continue for the next 20 years.

Author and housing journalist Peter Apps investigates the building safety crisis through the story of one building which has many of the problems afflicting places across the country.

What is the reality for people living there? Why was it built like this? And with the government's promise of 1.5 million new homes over the next five years, do we risk making the same mistakes again?

Presenter: Peter Apps

A Reduced Listening production for Radio 4

2024 experienced the wettest period since records began and extreme rainfall events are becoming more frequent because of climate change. So what's being done to protect us from flooding - and is it enough? The Government has said it will build 1.5 million new homes by the end of the current parliament - but File on 4 Investigates has discovered that hundreds of thousands of homes have already been built in areas at high risk of flooding. And a measure to protect new properties against flash floods caused by intense rainfall has never been made compulsory - despite being introduced 15 years ago.

Reporter: Adrian Goldberg

Pet ownership has rocketed since the covid pandemic, but so have vet prices. In fact, bills have increased by more than 60% in the last ten years. The Competition and Markets Authority is so concerned about the increases it has a launched an investigation into the industry and is due to reveal its findings this year. Datshiane Navanyagam investigates the pet industry and the corporate takeover of high street vets – talking to whistleblowers about how they feel they're being measured on the amount of money they bring in.

Reporter: Datshiane Navanayagam

Every year the UK produces around 50 million tyres for disposal. They’re supposed to be sent for recycling. Instead, big money is being made by diverting tyres to illegal and dangerous 'pyrolysis' plants they're melted down to extract oil and steel. File on 4 Investigates, together with a team of journalists from Source Material, a not-for-profit group specialising in climate and corruption, follow the tyres from the UK to India using tracking devices. The team discovers just how large scale this largely illicit business has become. Earlier this year, a makeshift pyrolysis plant exploded near Mumbai, killing four people. It had been processing tyres from abroad, almost certainly Europe and the UK. Reporter Paul Kenyon confronts a tyre trader in the north of England who admits to shipping his waste tyres to India for pyrolysis.

Reporter: Paul Kenyon

At least two women are murdered every week in the UK in a domestic abuse situation. Newspapers often call it a crime of passion. ‘He lost control’. But what if that’s not true? What if there was a blueprint that, if recognised, could save a woman’s life?

The Homicide Timeline contains eight stages that track the escalation of a controlling relationship from before a couple even meet right up to homicide. Families often say “I wish I’d known”. This programme will tell them the signs to look out for so that they do know, and can stop it.

File on 4 Investigates tells the story of Kasibba – a woman locked up as a schoolgirl in a mental health hospital. She languished there for 45 years - despite not being mentally ill. She was finally freed two years ago after the intervention of a rookie psychologist. Reporter Carolyn Atkinson asks why so many autistic people and/or those with a learning disability, including children, are still locked up and why successive governments have failed to meet their promises to move people from hospital to home.

Reporter: Carolyn Atkinson

File on 4 Investigates goes to Burnley in Lancashire to meet the young people and their families as they grapple with a ketamine epidemic.

Reporter: Jane Deith

With the billions he made at the expense of Russian taxpayers, Roman Abramovich bought six luxury superyachts over the years. Among them were the 162-metre-long Eclipse, with swimming pools, helipads and a missile defence system - and the Pelorus - sometimes lent to Chelsea footballers.

They could each cost up to one and a half million dollars just to re-fuel. If they’d been declared as being for his own personal use, VAT would have been payable on costs like that. Instead, for more than a decade, tax authorities were led to believe the superyachts were being rented out to commercial customers.

Reporter: Andy Verity

Tens of thousands of children and young people across the UK suffer from severe forms of epilepsy which are resistant to treatment.

Michael Buchanan examines why the University Hospitals Sussex NHS trust, once considered one of England’s best, has now got the largest number of patients waiting over 18 months for treatment. On top of this there is a growing police investigation into allegations of poor care.

Rporter: Michael Buchanan